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SDR DUFA20110002

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Service difficulty report · O-Ring · Swrngn SA227AC

FAA SDR system

Difficulty date
July 28, 2011
Submitted
July 29, 2011
Operation
Air carrier
Aircraft
N3108B
Make and model
Swrngn SA227AC
Aircraft serial
AC509
Aircraft time
33,724 hours, 46,602 cycles
Engine
Garrtt TPE33111U
Engine time
30,357 hours, 40,504 cycles
System (JASC)
7321 · Fuel Control/Turbine Engines
Part
O-Ring
Part number
S9412012
Condition
Cut
Location
Press Regulator
Stage of operation
TO
How discovered
O
Nature of condition
R, J
Precautionary procedure
E, C

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

WHILE ON TAKEOFF, THE PILOT BEGAN TO LOSE POWER FROM THE RT ENGINE. HE IMMEDIATELY PULLED THE "STOP & FEATHER" CONTROL AND SECURED THE ENGINE. HE COMPLETED A GO AROUND TO AN UNEVENTFUL LANDING. MX WAS CALLED AND IT WAS DISCOVERED THAT ONE OF THE O-RINGS THAT SEALED THE START PRESSURE REGULATOR TO THE FUEL CONTROL UNIT HAD FAILED. THIS CAUSED A LOSS OF FUEL PRESSURE TO THE FUEL CONTROL. NEW O-RINGS WERE INSTALLED AND THE ENGINE WAS GROUND RUN AND LEAK CHECKED WITH NO DISCREPANCIES NOTED.